We focused our corpus compilation effort on Reddit for a number of reasons. First, in comparison to Twitter, Reddit shares many of the same research friendly features (e.g., responsiveness to current events, public posts, and available APIs) [1]}, but is organized into what are called subreddits. Different subreddits have distinct topics and consistent communities [2]}, [3]} with varying cultures and norms [4]}, [5]}. In relation to morality, these distinct communities and norms have led researchers to use Reddit to investigate moral conflicts across groups [6]}, a phenomena that is harder to investigate on Twitter (which does not have organized groups) or Facebook (where many groups are private). Second, Reddit provides more anonymity than many other social media platforms, potentially enabling users to more freely speak their minds and express their opinions [7]}, [8]}, [9]}. Third, in addition to general differences in language usage [10]}, the lack of restriction on the length of posts on Reddit may be particularly beneficial for training models. Fourth, we believe that Reddit has played a distinct role in contemporary politics. For example, the r/TheDonald and r/incels subreddits have been linked to political extremism [11]} and mass shootings [12]}.
